Rock-drill.



D. S. WAUGH.

-ROCK DRILL.

APPLICATION FILED FEB. I9. I9I5.

Patented May15,`1917.

3 SHEETS-SHEET l.

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D. S. WAUGH.

ROCK DRILL.

APPLICATION FILED FEB. I9, I9I5. 1,225,898. Patented May 15, 191.7.

3 SHEETS-SHEET 2.

D. S. WAUGH.

ROCK DRILL.

APPLICATION man 11:11.19, 1915.

'1,225,898. Patented May15,1917.

3 SHEETS-SHEET'I'L II* STAT@ AEI* @FFIQEQ DANIEL SHAW WAUGI-I, OF IDENVER, COLORADO, ASSIGNOR TO THE DENVER ROCK DRILL MANUFACTURING (LODIIPANY,y 0F DENVER, COLORADO, A CORPORATION OF DELAWARE.

ROCK-DRILL.

Specification of Letters Patent. I P2M-,grated lwzty 15, 19??.

Application filed February 19, 1915. Serial No. 9,477.

To ZU ywhom 'it may Concern.'

Bc it known that I, DANIEL S. IVAUGH, a citizen of the United States, residing at Denver. in the county ol Denver and State of Colorado, have invented new and useful Improvements in Rock-Drills, of which the following is a specification.

rl`he present invention relates to rock drills, and in the embodiment disclosed, to that or" the hammer piston type.

rlhe primary object of the present invention is to provide novel and effective means for rotating the drill by separate motor from that which actuates the drill to eil'ect the drilling operation.

@ne or' the primary objects is to provide novel means ot' a simple character, whereby the drill may be placed against the work before it is thrown into operation, said means also controlling the operation of the actuating motor and the rotating motor in a manner that will permit the latter' to operate effectively, while the actuating motor can be throttled down so' as to strike a light blow. This, .it will be understood, is advantageous when the drill bit has a tendency to stick.

Another and important object is to provide means whereby the motive Huid which actuates the drill rotating motor is independent or separate from that supplied to the drill actuating motory but the distribu tion et said motive fluid to the rotating mo tor, and consequently the operation of the latter. is dependent on the operation of the drill actuating motor.

Another feature of the invention resides in means whereby the drill rotating motor is supplied with motive Huid for a longer period on its working stroke than on its return stroke, thus insuring a proper movement of the drill.

n embodiment ot the invention that has been tound satisfactory for carrying out these and other objects is disclosed in the accompanying drawings, wherein Figure 1 is a longitudinal sectiona'lview through the drill mechanism.

Fig. Q is a plan view of the same partially in section.

' is a cross sectional view on an en ,e L: is a detail horizontal sectional view Vtterent planes of the distributing valve 'i di for the drill rotating motor and illustrating the arrangement oli the various ports.

Fig. 5 is a cross sectional view on an enlarged scale and on the line 5 5 of Fig. 1.

Fig. 6 is a detail perspective view of the ratchet mechanism and chuck sleeve.

Fig. 7 is a detail sectional view on the line 7-7 of Fig. 2.

Fig. 8 is a detail perspective view of the distributing valve for the drill rotating motor.

Fig. 9 is a diagrammatic view illustrating the arrangement or' the ports and passages of the apparatus.

Similar reference numerals designate corresponding parts in all the figures of the drawings.

In the embodiment disclosed, a drill actu` ating motor of well known type is illustrated, comprising a cylinder member Vl() having a front piston chamber l1 of relatively large diameter and a rear piston chamber 12 of relatively small diameter, together with a piston 13 located in said cylinder member and having a front enlarged piston head 111 that operates in the piston chamber 11 and a rear reduced piston head 15 that operates in the rear chamber 12. Se cured rto the rear end ot' the drill actuating motor is fluid operated means for holding the drill to its work, the same being of the well known type, and a portion thereof in the form of a cylinder 16 being shown. Secured to the front end of the cylinder member 10 is a head 17, and abutted against said head is a chuck, generally designated by the reference numeral 18.

In said chuck is located a rotatable chuclv sleeve'19 having a longitudinal socket 20 therethrough that is angular in cross section and is'designed to detachably receive a drill bit of similar cross sectional configuration`I as is well understood. This drill bit is arranged to abut against a tappet 21 located in the head 17 and projecting into the path of the hammer piston 13.

The chuck sleeve 19 isprovided with a central series of peripheral ratchet teeth 22 surrounded by a ring 23 having an upstanding lug or arm 24 that is provided wi th a rounded enlarged head 25. This arm or lug also has an internal socket 26 in which is slidably mounted a spring-pressed pawl 27, which cooperates with the teeth 22, as

will be evident by reference to Figs. 5 and 6. The pawl rino' operates in a ratchet chamber 28 formed in the chuck head 1S, and said chuck head also carries a drill rotating motor.

The said drill rotating motor, as clearly shown in Figs. 1, 2 and 5, comprises a cylinder member 29 disposed.transversely to the drilling apparatus, and containing a reciprocatory piston comprising spaced heads 30 and 31 operating in the end por` tions of the cylinder member 29 and connected by an integral yoke 32 having a socket 33 that receives the head of the ratchet ring 23. lt will thus be evident that if the piston 30-31 is reciprocated, the ratchet ring 23 will be oscillated and the chuck sleeve will thus be given a step-bystep rotation. As viewed in Fig. 5, when the piston moves to the left, it is given a working stroke inasmuch as the pawl 27 is then interlocked with the teeth 22 of the chuck sleeve 19, while on its return stroke, said pawl rides over one or more of the said teeth.

Referring now more particularly to Fig. 2, fluid under pressure is supplied to the apparatus from any suitable source to and through a nipple 34 threaded into the larger end of a tapered valve seat 35. ln this seat is .rotatably mounted a tapered valve 36 hav` ing on its projecting smaller end an actuating handle 37. The larger end of the valve 36, or in other words that adjacent to the nipple 34, has a longitudinally disposed recess 3S having ports 39 and 40, the port 40 being of greater width than the port 39, as illustrated in Fig. 7. The port 39 is movable into and out of register with a port 41 which communicates by means of one or more passageways 42'with the moans for feeding the drilling apparatus and holding it to its work, while the port 40 is movable into and out of register with a port 43 communicating with a passageway 44 extending longitudinally through the cylinder member 10 and head 17, where it communicates with a central internal groove 45 formed around a distributing valve chamber 46 in the chuck head 18. rl`he valve chamber 46 is provided with other annular internal grooves 47 and 43, and a passageway 49 leads from the groove 47 to one end of the drill rotating cylinder 29. Another passageway 50 leads from the other groove 43 to the opposite end of said cylinder. ln ad dition an exhaust port 51 leads from one end of the valve chamber 4-6 into the cylinder 29 between piston heads 30 and 31 and is thus in communication with the ratchet chamber 28. From this ratchet chamber an exhaust passageway 52 leads rearwardly through the head 17 and opens into the outer air.

4Operating in the chamber 46 is a differen- A normal tendency of the valve is to be in the position illustrated in Fig. 4. It is, however, provided on its larger end with a pressure surface 58, the utility of which is hereinafter described. Said valve furthermore has a central exhaust passage 59 that is in constant communication with the port 51,

and branches 60 lead from this eXhaust passage to the periphery of the larger head 54.

Referring now to Figs. 1 and 2, it will be noted that the throttle valve 36 is also prof vided with an angular port 61 extending transversely therethrough, being separate from the recess 36. One end of this port is movable into and .out of register with a port 62 that communicates with the passageway 42 that is connected with the feed means 16, such communication being established by the annular channel 42a while the opposite end of said port 61 is movable into and out of register with a port 64 communicating with the rear portion of the piston chamber 12 of the drill actuating motor. A passageway 65 leads from said rear portion of the chamber 12 and is provided with two ports, one 66 which opens into the front end i of the larger piston chamber 11, while the other 67 passes through the head 17 and opens into the end of the distributing valve chamber 46 in which the larger head 54 operates. 1t will be noted by reference to Fig. 1 that the inlet end of the passageway 65 is covered and uncovered by the head 15 of the drill actuating motor piston 13.

The operation of the apparatus is substantially as follows: The throttle valve 36 may be turned so that all its ports are out of communication with the ports with which they can register, in which case, it will be evi.- dent that the motive fluid is entirely shut oliq from the apparatus. Having set the said apparatus in position to work, the said throttle valve is first turned to bring the ports 39 and 41 into partial register and this can be done without bringing any of the other ports into communication. result. it will be evident that motive fluid will be admitted to the feeding means, thereby moving the drill actuating motor to its work, but that said drill actuating motor and the drill rotating motor will still be inactive. lf now the throttle valve 36 is turned slightly farther, the ports 40 and 43 will be brought into communication, and the fluid will thus flow through the passageway ,As a

44 to the central groove45 of; the .distributing valve chamber 46. It will here act upon the pressure surface 56 of the valve and move the saine to` the left, thereby ,opening communication between the -groovef45 and the groove 48,;and .permitting the fluid to flow through the passage into one end of the cylinder member 29, causing the piston 30-31 to have a working stroke. At the same time that the motivezfluid .is .thus admitted to the drill rotating motor, the ports 62, 61 and 64 will be broughtinto register, and as a result, motiveffluid .willpass lfrom the annular. channel 42a :through the passageway 63,.v the ports 62, 61 and 64, into the drill actuating motor. lAs aconsequence the hammer piston 13 will be reciprocated. While the said piston 13 .is in its rearmost position the distributing valve will be in the positionfillustrated in: Figs. 1 Aand 4, but when the piston 13 is-in its advanced position, its head. 15 will uncover'thepassage 65, thereby admitting motive'fluid thereinto and through the ports 66 and G7. The motive fluidwhich enters'the frontend of the piston chamber 11 `in advance of the piston head 14, will drivethe piston 13 rearwardly, and at the same time 'that which passes through the port 67, will operate on the pressure surface 58. This surface being of greater area thanthe surface 56, the valve will be moved to the right. As avresult, the grooves 45 and 47 will be brought into communication withthe groove ofsaid valve, and motive fluid will flow through the passageway 49, so as to cause the piston 30-81 to move rearwardly or on its return stroke. As soon, however, as the hammer piston 13 has moved rearwardly a sufficient distance to cover the ports and 4open an exhaust port indicated in dotted lines at 65a, the motive fluid in the passageway 65v will exhaust through said port 65a, thereby relieving the pressure againstthe surface 5S rof the distributing valve and permittingthe pressure against the surface 56 to act and again move the valve to the left. In the operation of said valve, it will be noted that the exhaust ports 60 thereof are intermittently brought into communication with the groove 4S, so that the motive fluid behind the piston head 30 can exhaust through the passage 50, the ports 60, the passage 59, port 51, ratchet chamber 28 and passageway 52. When the valve is in the position shown in Figs. 1 and 4, the motive fluid will then eX- haust from behind the piston head 31, through the passageway 49, groove 47, port 51 into the ratchet chamber 28, and thence through the passageway 52.

In this operation, it will be noted that the length of time that the mo-tive fluid is permitted to act against the end of the distributing valve by the piston 13, is relatively short, as compared to thelength of time that the valve is held in its left hand position by the motive fluid operating against the pressure surface 56, so that the motive fluid acts upon the piston of the drill rotating motor for a greater length of time during its working stroke than it does during its return stroke. This is obviously a decided advantage. It will also be observed that in this apparatus the motive fluid which actuates thedrill rotating motor is not thatl l continuously tapped, and at thc same time effectively rotated.

From the foregoing, it is thought that the .construction operation and many advantages of the herein described invention will be apparent to those skilled in the art, without further description, and it will be understood that various changes in the size, shape, proportion and minor details of construction, may be resorted to without departingvfrom the spirit4 or sacrificing any of the advantages of the invention.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In apparatus of the character set forth, the combination with a drill actuating motor, of a drill rotating motor, means for supplying motive fluid to the drill rotating motor, a distributing `valve for said motive fluid, and means controlled by the actuating motor for delivering a charge of motive fluid partly against the distributing valve and partly and simultaneously to the motor to move both.

2. In apparatus of the character set forth, the combination with a drill actuating motor including a cylinder member and a piston operating therein, of a drill rotating motor, means for supplying motive fluid to the rotating motor, a distributing valve controlling said supply, and a passageway for delivering fluid against the piston and valve to move them, said passageway being controlled by the actuating motor piston on its movement.

3. In apparatus of the character set forth, the combination with a drill actuating motor including a cylinder member and a piston operating therein, of a drill rotating motor, means for supplying motive fluid to the rotating motor independently of that supplied to the drill actuating motor piston, a distributing valve controlling said supply,

and a passageway for delivering fiuid against the actuating piston and valve to move both, said passageway being controlled by the actuating motor piston on its movement.

4. In apparatus of the character set forth, the combination with a drill actuating motor, of a drill rotating motor, means for delivering motive fluid to the latter, a differential distributing valve for the motive fluid delivered to the rotating motor, said valve having a pressure surface operated on by said motive fluid, to move the valve in one direction and having an opposed pressure surface, and means controlled by the actuating motor for independently delivery ing a charge of motive fluid partly to said motor to operate it and partly and simultaneously against .said opposite pressure surface.

5. In apparatus of the character set forth,

. the combination with a drill actuating motor, of a drill rotating motor, means for` delivering motive fluid to the latter, including a distributing valve chamber, spaced passages leading therefrom to the rotating motor, and a supply passage leading to the intermediate portion of the chamber, a differential distributing valve in said chamber having a pressure surface against which the supply constantly operates and an opposing end surface of greater area, and means controlled by the actuating motor for delivering motive fluid intermittently against said end surface, to move said valve against said constant pressure.

6. In apparatus of the character set forth, the combination with a drill actuating motor, including a cylinder member and a piston operating therein, of a drill rotating motor, a distributing valve for the rotating motor, and means for intermittently and simultaneously supplying a charge of motive Huid partly to the actuating motor piston and partly to the distributing valve for simultaneously moving both in one direction.

7. In apparatus of the character set forth, the combination with a drill actuating m0- tor, including a cylinder member and a piston operating therein, of a drill rotating motor, a distributing valve for the rotating motor, and means controlled vby the actuating motor piston for intermittently and simultaneously supplying a charge of motive fluid partly to the actuating motor piston and partly to the distributing valve for simultaneously moving both in one direction.

8. In apparatus of the character set forth, the combination with a drill actuating motor including a cylinder member and a piston operating therein and having a working and return stroke, of a drill rotating motor, a distributing valve for the rotating motor,

means for controlling the .supply of motive fluid to the distributing valve independent of that delivered to the actuating motor piston, and means controlled by the actuating motor piston for intermittently and simultaneously delivering a charge of motive fluid partly against the piston and partly against the distributing valve to move both in predetermined directions.

9. In apparatus of the character set forth, the combination with a drill actuating motor, including a cylinder member and a pist0n operating therein and having a Working and a return stroke, of a drill rotating motor, means for supplying motive fluid to the drill rotating motor independent of that supplied to the actuating motor piston, a distributing valve for the rotating motor having a pressure surface constantly acted on by the motive fluid supplied thereto and having an opposing surface of greater area, and means controlled by the actuating motor piston for simultaneously delivering motive fluid against the same and against said larger pressure surface of the distributing 90 valve.

10. In apparatus of the character set forth, the combination with a drill actuating motor including a cylinder member and a piston operating therein, of a drill rotating motor, means for supplying motive fluid to the drill rotating motor including a valve chamber, spaced passageways leading therefrom to the rotating motor and a supply passage communicating with said valve chamber, a distributing valve in the chamber having a back and forth movement and provided with a pressure surface against which the motive fluid constantly acts, and an opposing pressure surface of greater area, means for supplying motive fluid to the drill actuating motor, includ-ing a passageway controlled by the piston thereof for delivering motive iuid to cause the return stroke of said piston, and a port communicating with said passageway and delivering against the said opposing surface of the distributing valve.

1l. In apparatus of the character set forth, the combination with a drill actuat- 115 ing motor, of a drill rotating motor including a piston having a working and a return stroke, and automatic means for supplying motive fluid to and exhausting it from the rotating motor both on its work- 120 ing and return strokes and maintaining the fluid supply for a longer period on its working stroke than on its return stroke.

l2. In apparatus of the character set forth, the combination with a drill actuat- 125 ing motor, of a drill rotating motor including a piston having a working and a return stroke, and means controlled by the actuating motor for automatically supplying motive fluid to and exhausting it from the ro- 130 tating motor both on its Working` and return strokes and maintaining` the liuid supply for a longer period on its Working stroke than on its return stroke.

18. In apparatus of the character set forth, the combination With a drill actuating motor including a cylinder member and a piston operating therein, of a drill rotating motor including a cylinder member and a piston operating therein, said piston having a Working and a return stroke, means for supplying motive fluid to the rotating motor, a distributing` valve for directing` the fluid to the rotating motor to alternately cause its working and return strokes, and means for holding the valve inits Working stroke position for a longer period than in its return stroke position.

let. ln apparatus of the character set forth, the combination With a drill actuating motor including a cylinder member and a piston operating therein, of a drill rotating motor including a cylinder member and a piston operating therein7 said piston having a Working and a return stroke, means for supplying motive fluid to lthe rotating motor, a distributing valve for directing the fluid to the rotating` motor to alternately cause its Working and return strokes, and means controlled by the actuating motor piston for holding the valve in its Working stroke position for a longer period than in its return stroke position.

15. In apparatus of the character set forth, the combination with a drill actuating` motor and a drill rotating motor, of a chuck having a ratchet chamber, a chuck sleeve, and ratchet mechanism in said chamber for effecting a step by step rotation of the chuck, said ratchet mechanism being actuated by the rotating motor, means for supplying motive fluid to the rotating motor, a distributing valve for said motive fiuid supply, and exhaust means for said rotating motor controlled by said distributing valve, said exhaust means including a port opening into the ratchet chamber and a port leading therefrom to the open air.

16.1n apnaratus of the character sety forth, the combination With a drill actuating motor, including a cylinder member and a piston therein, of a drill rotating motor, means for supplying motive fluid to the rotating` motor, means for distributing such supply, and means for supplying successive charges of motive fluid to the motor, dividing each charge and directing a portion of said charge 'to the distributing means to operate the same and simultaneously a portion to the actuating piston for operating it.

In testimony whereof 1 have hereunto set my hand in presence of tivo subscribing Witnesses.

his DANIEL SHA`W VAUGH.

niark Witnesses:

VILLIAM H. LEONARD, HARRIET G. VVAUGH.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

